Dephasing in disordered metals with superconductive grains

M. A. Skvortsov; A. I. Larkin; M. V. Feigel'man

doi:10.1103/physrevlett.92.247002

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Dephasing in disordered metals with superconductive grains

M. A. Skvortsov·A. I. Larkin·M. V. Feigel'man

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Abstract

Temperature dependence of electron dephasing time $τ_ϕ(T)$ is calculated for a disordered metal with small concentration of superconductive grains. Above the macroscopic superconducting transition line, when electrons in the metal are normal, Andreev reflection from the grains leads to a nearly temperature-independent contribution to the dephasing rate. In a broad temperature range $1/τ_phi(T)$ strongly exceeds the prediction of the classical theory of dephasing in normal disordered conductors, whereas magnetoresistance is dominated (in two dimensions) by the Maki-Tompson correction and is positive.

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M. A. Skvortsov, A. I. Larkin, M. V. Feigel'man. 2003-11-07. Dephasing in disordered metals with superconductive grains. https://doi.org/10.1103/physrevlett.92.247002

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